1013213122020 has 72 divisors (see below), whose sum is σ = 3352814337600. Its totient is φ = 245627423040.

The previous prime is 1013213122013. The next prime is 1013213122027. The reversal of 1013213122020 is 202213123101.

1013213122020 is a `hidden beast` number, since 10 + 1 + 321 + 312 + 2 + 0 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (1013213122013) and next prime (1013213122027).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1013213121984 and 1013213122002.

It is not an unprimeable number, because it can be changed into a prime (1013213122027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 255859920 + ... + 255863879.

It is an arithmetic number, because the mean of its divisors is an integer number (46566865800).

Almost surely, 2^{1013213122020} is an apocalyptic number.

1013213122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1013213122020 is an abundant number, since it is smaller than the sum of its proper divisors (2339601215580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1013213122020 is a wasteful number, since it uses less digits than its factorization.

1013213122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511723825 (or 511723820 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1013213122020 its reverse (202213123101), we get a palindrome (1215426245121).

The spelling of 1013213122020 in words is "one trillion, thirteen billion, two hundred thirteen million, one hundred twenty-two thousand, twenty".