121401021412 has 12 divisors (see below), whose sum is σ = 231765586416. Its totient is φ = 55182282440.

The previous prime is 121401021407. The next prime is 121401021431. The reversal of 121401021412 is 214120104121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121401021412.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1379557018 + ... + 1379557105.

It is an arithmetic number, because the mean of its divisors is an integer number (19313798868).

Almost surely, 2^121401021412 is an apocalyptic number.

It is an amenable number.

121401021412 is a deficient number, since it is larger than the sum of its proper divisors (110364565004).

121401021412 is a wasteful number, since it uses less digits than its factorization.

121401021412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2759114138 (or 2759114136 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121401021412 its reverse (214120104121), we get a palindrome (335521125533).

The spelling of 121401021412 in words is "one hundred twenty-one billion, four hundred one million, twenty-one thousand, four hundred twelve".