2121111002 has 4 divisors (see below), whose sum is σ = 3181666506. Its totient is φ = 1060555500.

The previous prime is 2121110983. The next prime is 2121111007. The reversal of 2121111002 is 2001111212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2089312681 + 31798321 = 45709^2 + 5639^2 .

It is a super-2 number, since 2×2121111002² = 8998223765610888008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121111007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530277749 + ... + 530277752.

Almost surely, 2^2121111002 is an apocalyptic number.

2121111002 is a deficient number, since it is larger than the sum of its proper divisors (1060555504).

2121111002 is a wasteful number, since it uses less digits than its factorization.

2121111002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060555503.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2121111002 is about 46055.5208634101. The cubic root of 2121111002 is about 1284.8560254950.

Adding to 2121111002 its reverse (2001111212), we get a palindrome (4122222214).

The spelling of 2121111002 in words is "two billion, one hundred twenty-one million, one hundred eleven thousand, two".