10121020211078 has 32 divisors (see below), whose sum is σ = 18213567621120. Its totient is φ = 4126511393280.

The previous prime is 10121020211077. The next prime is 10121020211087. The reversal of 10121020211078 is 87011202012101.

It is a happy number.

It is a super-2 number, since 2×10121020211078² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121020211077) 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, 197604251 + ... + 197655462.

It is an arithmetic number, because the mean of its divisors is an integer number (569173988160).

Almost surely, 2^{10121020211078} is an apocalyptic number.

10121020211078 is a deficient number, since it is larger than the sum of its proper divisors (8092547410042).

10121020211078 is a wasteful number, since it uses less digits than its factorization.

10121020211078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395259812.

The product of its (nonzero) digits is 448, while the sum is 26.

Adding to 10121020211078 its reverse (87011202012101), we get a palindrome (97132222223179).

The spelling of 10121020211078 in words is "ten trillion, one hundred twenty-one billion, twenty million, two hundred eleven thousand, seventy-eight".