21111210010002 has 16 divisors (see below), whose sum is σ = 48254194308672. Its totient is φ = 6031774288560.

The previous prime is 21111210009977. The next prime is 21111210010003. The reversal of 21111210010002 is 20001001211112.

It is a super-4 number, since 4×21111210010002⁴ (a number of 54 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21111210010002.

It is not an unprimeable number, because it can be changed into a prime (21111210010003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251323928649 + ... + 251323928732.

It is an arithmetic number, because the mean of its divisors is an integer number (3015887144292).

Almost surely, 2^{21111210010002} is an apocalyptic number.

21111210010002 is an abundant number, since it is smaller than the sum of its proper divisors (27142984298670).

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

21111210010002 is a wasteful number, since it uses less digits than its factorization.

21111210010002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502647857393.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21111210010002 its reverse (20001001211112), we get a palindrome (41112211221114).

The spelling of 21111210010002 in words is "twenty-one trillion, one hundred eleven billion, two hundred ten million, ten thousand, two".