2121001212007 has 2 divisors, whose sum is σ = 2121001212008. Its totient is φ = 2121001212006.

The previous prime is 2121001211963. The next prime is 2121001212019. The reversal of 2121001212007 is 7002121001212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121001212007 is a prime.

It is a super-2 number, since 2×2121001212007² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121001212607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060500606003 + 1060500606004.

It is an arithmetic number, because the mean of its divisors is an integer number (1060500606004).

Almost surely, 2^{2121001212007} is an apocalyptic number.

2121001212007 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121001212007 is an equidigital number, since it uses as much as digits as its factorization.

2121001212007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 2121001212007 its reverse (7002121001212), we get a palindrome (9123122213219).

The spelling of 2121001212007 in words is "two trillion, one hundred twenty-one billion, one million, two hundred twelve thousand, seven".