1212020001021 has 32 divisors (see below), whose sum is σ = 1635365071872. Its totient is φ = 798392044800.

The previous prime is 1212020001013. The next prime is 1212020001053. The reversal of 1212020001021 is 1201000202121.

It is not a de Polignac number, because 1212020001021 - 2³ = 1212020001013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212020000988 and 1212020001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212020001061) 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, 179209986 + ... + 179216748.

It is an arithmetic number, because the mean of its divisors is an integer number (51105158496).

Almost surely, 2^{1212020001021} is an apocalyptic number.

It is an amenable number.

1212020001021 is a deficient number, since it is larger than the sum of its proper divisors (423345070851).

1212020001021 is a wasteful number, since it uses less digits than its factorization.

1212020001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8433.

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

Adding to 1212020001021 its reverse (1201000202121), we get a palindrome (2413020203142).

The spelling of 1212020001021 in words is "one trillion, two hundred twelve billion, twenty million, one thousand, twenty-one".