1020120021010 has 8 divisors (see below), whose sum is σ = 1836216037836. Its totient is φ = 408048008400.

The previous prime is 1020120021007. The next prime is 1020120021077. The reversal of 1020120021010 is 101200210201.

It can be written as a sum of positive squares in 2 ways, for example, as 1019916188281 + 203832729 = 1009909^2 + 14277^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 102012002101 = 1020120021010 / (1 + 0 + 2 + 0 + 1 + 2 + 0 + 0 + 2 + 1 + 0 + 1 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51006001041 + ... + 51006001060.

Almost surely, 2^{1020120021010} is an apocalyptic number.

1020120021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1020120021010 is a deficient number, since it is larger than the sum of its proper divisors (816096016826).

1020120021010 is a wasteful number, since it uses less digits than its factorization.

1020120021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102012002108.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1020120021010 its reverse (101200210201), we get a palindrome (1121320231211).

The spelling of 1020120021010 in words is "one trillion, twenty billion, one hundred twenty million, twenty-one thousand, ten".