122520155450 has 48 divisors (see below), whose sum is σ = 284119475904. Its totient is φ = 38188099200.

The previous prime is 122520155447. The next prime is 122520155453. The reversal of 122520155450 is 54551025221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (122520155447) and next prime (122520155453).

It is a super-2 number, since 2×122520155450² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (122520155453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15907859 + ... + 15915558.

It is an arithmetic number, because the mean of its divisors is an integer number (5919155748).

Almost surely, 2^122520155450 is an apocalyptic number.

122520155450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122520155450 is an abundant number, since it is smaller than the sum of its proper divisors (161599320454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122520155450 is a wasteful number, since it uses less digits than its factorization.

122520155450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31823447 (or 31823442 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 32.

The spelling of 122520155450 in words is "one hundred twenty-two billion, five hundred twenty million, one hundred fifty-five thousand, four hundred fifty".