1210021102020 has 96 divisors (see below), whose sum is σ = 3400952583168. Its totient is φ = 321444968832.

The previous prime is 1210021101997. The next prime is 1210021102027. The reversal of 1210021102020 is 202011200121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1210021101987 and 1210021102005.

It is not an unprimeable number, because it can be changed into a prime (1210021102027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84332487 + ... + 84346833.

It is an arithmetic number, because the mean of its divisors is an integer number (35426589408).

Almost surely, 2^{1210021102020} is an apocalyptic number.

1210021102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210021102020 is an abundant number, since it is smaller than the sum of its proper divisors (2190931481148).

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

1210021102020 is a wasteful number, since it uses less digits than its factorization.

1210021102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19609 (or 19607 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1210021102020 its reverse (202011200121), we get a palindrome (1412032302141).

The spelling of 1210021102020 in words is "one trillion, two hundred ten billion, twenty-one million, one hundred two thousand, twenty".