21122001149 has 16 divisors (see below), whose sum is σ = 22367741760. Its totient is φ = 19890000000.

The previous prime is 21122001139. The next prime is 21122001151. The reversal of 21122001149 is 94110022112.

It is a cyclic number.

It is not a de Polignac number, because 21122001149 - 2¹² = 21121997053 is a prime.

It is a super-2 number, since 2×21122001149² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122001139) 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, 2480399 + ... + 2488899.

It is an arithmetic number, because the mean of its divisors is an integer number (1397983860).

Almost surely, 2^21122001149 is an apocalyptic number.

It is an amenable number.

21122001149 is a deficient number, since it is larger than the sum of its proper divisors (1245740611).

21122001149 is a wasteful number, since it uses less digits than its factorization.

21122001149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9292.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 21122001149 in words is "twenty-one billion, one hundred twenty-two million, one thousand, one hundred forty-nine".