21533150122 has 16 divisors (see below), whose sum is σ = 36451101600. Its totient is φ = 9450285040.

The previous prime is 21533150099. The next prime is 21533150141. The reversal of 21533150122 is 22105133512.

It is a super-2 number, since 2×21533150122² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16874872 + ... + 16876147.

It is an arithmetic number, because the mean of its divisors is an integer number (2278193850).

Almost surely, 2^21533150122 is an apocalyptic number.

21533150122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21533150122 is a deficient number, since it is larger than the sum of its proper divisors (14917951478).

21533150122 is a wasteful number, since it uses less digits than its factorization.

21533150122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33751061.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 21533150122 its reverse (22105133512), we get a palindrome (43638283634).

The spelling of 21533150122 in words is "twenty-one billion, five hundred thirty-three million, one hundred fifty thousand, one hundred twenty-two".