121211012002 has 4 divisors (see below), whose sum is σ = 181816518006. Its totient is φ = 60605506000.

The previous prime is 121211011973. The next prime is 121211012009. The reversal of 121211012002 is 200210112121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200210112121 = 26951 ⋅7428671.

It can be written as a sum of positive squares in only one way, i.e., 103567468761 + 17643543241 = 321819^2 + 132829^2 .

It is not an unprimeable number, because it can be changed into a prime (121211012009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30302752999 + ... + 30302753002.

Almost surely, 2^121211012002 is an apocalyptic number.

121211012002 is a deficient number, since it is larger than the sum of its proper divisors (60605506004).

121211012002 is an equidigital number, since it uses as much as digits as its factorization.

121211012002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60605506003.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121211012002 its reverse (200210112121), we get a palindrome (321421124123).

The spelling of 121211012002 in words is "one hundred twenty-one billion, two hundred eleven million, twelve thousand, two".