121211021006 has 16 divisors (see below), whose sum is σ = 186320993040. Its totient is φ = 59105133120.

The previous prime is 121211020981. The next prime is 121211021011. The reversal of 121211021006 is 600120112121.

It is a super-2 number, since 2×121211021006² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56576 + ... + 495603.

It is an arithmetic number, because the mean of its divisors is an integer number (11645062065).

Almost surely, 2^121211021006 is an apocalyptic number.

121211021006 is a deficient number, since it is larger than the sum of its proper divisors (65109972034).

121211021006 is a wasteful number, since it uses less digits than its factorization.

121211021006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554899.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121211021006 its reverse (600120112121), we get a palindrome (721331133127).

The spelling of 121211021006 in words is "one hundred twenty-one billion, two hundred eleven million, twenty-one thousand, six".