21022012101021 has 16 divisors (see below), whose sum is σ = 28040201473536. Its totient is φ = 14009249372976.

The previous prime is 21022012101019. The next prime is 21022012101037. The reversal of 21022012101021 is 12010121022012.

It is not a de Polignac number, because 21022012101021 - 2¹ = 21022012101019 is a prime.

It is a super-3 number, since 3×21022012101021³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022012101071) 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, 148365616 + ... + 148507238.

It is an arithmetic number, because the mean of its divisors is an integer number (1752512592096).

Almost surely, 2^{21022012101021} is an apocalyptic number.

It is an amenable number.

21022012101021 is a deficient number, since it is larger than the sum of its proper divisors (7018189372515).

21022012101021 is a wasteful number, since it uses less digits than its factorization.

21022012101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160432.

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

Adding to 21022012101021 its reverse (12010121022012), we get a palindrome (33032133123033).

The spelling of 21022012101021 in words is "twenty-one trillion, twenty-two billion, twelve million, one hundred one thousand, twenty-one".