211204101021 has 16 divisors (see below), whose sum is σ = 284354509824. Its totient is φ = 139429298864.

The previous prime is 211204101001. The next prime is 211204101047. The reversal of 211204101021 is 120101402112.

It is a cyclic number.

It is not a de Polignac number, because 211204101021 - 2⁷ = 211204100893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211204101001) 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, 651046 + ... + 919928.

It is an arithmetic number, because the mean of its divisors is an integer number (17772156864).

Almost surely, 2^211204101021 is an apocalyptic number.

It is an amenable number.

211204101021 is a deficient number, since it is larger than the sum of its proper divisors (73150408803).

211204101021 is a wasteful number, since it uses less digits than its factorization.

211204101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271440.

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

Adding to 211204101021 its reverse (120101402112), we get a palindrome (331305503133).

The spelling of 211204101021 in words is "two hundred eleven billion, two hundred four million, one hundred one thousand, twenty-one".