21021101211112 has 8 divisors (see below), whose sum is σ = 39414564770850. Its totient is φ = 10510550605552.

The previous prime is 21021101210987. The next prime is 21021101211163. The reversal of 21021101211112 is 21111210112012.

It can be written as a sum of positive squares in only one way, i.e., 16304846381476 + 4716254829636 = 4037926^2 + 2171694^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21021101211112² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1313818825687 + ... + 1313818825702.

Almost surely, 2^{21021101211112} is an apocalyptic number.

It is an amenable number.

21021101211112 is a deficient number, since it is larger than the sum of its proper divisors (18393463559738).

21021101211112 is a wasteful number, since it uses less digits than its factorization.

21021101211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2627637651395 (or 2627637651391 counting only the distinct ones).

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

Adding to 21021101211112 its reverse (21111210112012), we get a palindrome (42132311323124).

The spelling of 21021101211112 in words is "twenty-one trillion, twenty-one billion, one hundred one million, two hundred eleven thousand, one hundred twelve".