211221210001038 has 64 divisors (see below), whose sum is σ = 426668082204672. Its totient is φ = 69706558172160.

The previous prime is 211221210001037. The next prime is 211221210001049. The reversal of 211221210001038 is 830100012122112.

It is a happy number.

It is a super-2 number, since 2×211221210001038² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211221210000999 and 211221210001017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221210001033) 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, 638503518 + ... + 638834238.

It is an arithmetic number, because the mean of its divisors is an integer number (6666688784448).

Almost surely, 2^{211221210001038} is an apocalyptic number.

211221210001038 is an abundant number, since it is smaller than the sum of its proper divisors (215446872203634).

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

211221210001038 is a wasteful number, since it uses less digits than its factorization.

211221210001038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333569.

The product of its (nonzero) digits is 384, while the sum is 24.

The spelling of 211221210001038 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred ten million, one thousand, thirty-eight".