21122000020091 has 8 divisors (see below), whose sum is σ = 21867062825520. Its totient is φ = 20378051746528.

The previous prime is 21122000020061. The next prime is 21122000020127. The reversal of 21122000020091 is 19002000022112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21122000020091 - 2¹⁴ = 21122000003707 is a prime.

It is a super-2 number, since 2×21122000020091² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21122000020061) 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, 278594396 + ... + 278670201.

It is an arithmetic number, because the mean of its divisors is an integer number (2733382853190).

Almost surely, 2^{21122000020091} is an apocalyptic number.

21122000020091 is a deficient number, since it is larger than the sum of its proper divisors (745062805429).

21122000020091 is a wasteful number, since it uses less digits than its factorization.

21122000020091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557265933.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 21122000020091 in words is "twenty-one trillion, one hundred twenty-two billion, twenty thousand, ninety-one".