1021212310020 has 96 divisors (see below), whose sum is σ = 3280305143808. Its totient is φ = 232532403072.

The previous prime is 1021212310009. The next prime is 1021212310031. The reversal of 1021212310020 is 200132121201.

It is an interprime number because it is at equal distance from previous prime (1021212310009) and next prime (1021212310031).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4512084 + ... + 4733003.

It is an arithmetic number, because the mean of its divisors is an integer number (34169845248).

Almost surely, 2^{1021212310020} is an apocalyptic number.

1021212310020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021212310020 is an abundant number, since it is smaller than the sum of its proper divisors (2259092833788).

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

1021212310020 is a wasteful number, since it uses less digits than its factorization.

1021212310020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9245369 (or 9245367 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1021212310020 its reverse (200132121201), we get a palindrome (1221344431221).

The spelling of 1021212310020 in words is "one trillion, twenty-one billion, two hundred twelve million, three hundred ten thousand, twenty".