10121455021 has 16 divisors (see below), whose sum is σ = 10748395840. Its totient is φ = 9504293760.

The previous prime is 10121455007. The next prime is 10121455027. The reversal of 10121455021 is 12055412101.

10121455021 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10121455021 is a prime.

It is a super-2 number, since 2×10121455021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10121454983 and 10121455001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121455027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1071706 + ... + 1081108.

It is an arithmetic number, because the mean of its divisors is an integer number (671774740).

Almost surely, 2^10121455021 is an apocalyptic number.

It is an amenable number.

10121455021 is a deficient number, since it is larger than the sum of its proper divisors (626940819).

10121455021 is a wasteful number, since it uses less digits than its factorization.

10121455021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9916.

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 10121455021 its reverse (12055412101), we get a palindrome (22176867122).

The spelling of 10121455021 in words is "ten billion, one hundred twenty-one million, four hundred fifty-five thousand, twenty-one".