1211012202021 has 16 divisors (see below), whose sum is σ = 1670667292800. Its totient is φ = 779359477568.

The previous prime is 1211012202013. The next prime is 1211012202067. The reversal of 1211012202021 is 1202022101121.

It is a cyclic number.

It is not a de Polignac number, because 1211012202021 - 2³ = 1211012202013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211012202121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 794241 + ... + 1747238.

It is an arithmetic number, because the mean of its divisors is an integer number (104416705800).

Almost surely, 2^{1211012202021} is an apocalyptic number.

It is an amenable number.

1211012202021 is a deficient number, since it is larger than the sum of its proper divisors (459655090779).

1211012202021 is a wasteful number, since it uses less digits than its factorization.

1211012202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2546988.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1211012202021 its reverse (1202022101121), we get a palindrome (2413034303142).

The spelling of 1211012202021 in words is "one trillion, two hundred eleven billion, twelve million, two hundred two thousand, twenty-one".