121221223021402 has 8 divisors (see below), whose sum is σ = 207807810893856. Its totient is φ = 51951952723452.

The previous prime is 121221223021399. The next prime is 121221223021433. The reversal of 121221223021402 is 204120322122121.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 4329329393608 + ... + 4329329393635.

It is an arithmetic number, because the mean of its divisors is an integer number (25975976361732).

Almost surely, 2^{121221223021402} is an apocalyptic number.

121221223021402 is a deficient number, since it is larger than the sum of its proper divisors (86586587872454).

121221223021402 is an equidigital number, since it uses as much as digits as its factorization.

121221223021402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8658658787252.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 121221223021402 its reverse (204120322122121), we get a palindrome (325341545143523).

The spelling of 121221223021402 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty-three million, twenty-one thousand, four hundred two".