20121053554 has 48 divisors (see below), whose sum is σ = 36535039200. Its totient is φ = 8279905536.

The previous prime is 20121053551. The next prime is 20121053569. The reversal of 20121053554 is 45535012102.

It is a super-2 number, since 2×20121053554² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20121053551) 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, 208162 + ... + 289090.

It is an arithmetic number, because the mean of its divisors is an integer number (761146650).

Almost surely, 2^20121053554 is an apocalyptic number.

20121053554 is a deficient number, since it is larger than the sum of its proper divisors (16413985646).

20121053554 is a wasteful number, since it uses less digits than its factorization.

20121053554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81047 (or 81040 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 20121053554 its reverse (45535012102), we get a palindrome (65656065656).

The spelling of 20121053554 in words is "twenty billion, one hundred twenty-one million, fifty-three thousand, five hundred fifty-four".